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Porsche Club GB

996 C4S Check Engine light

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4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH996 C4S Check Engine light

Leading reported evidence

Replace along

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

Thanks for the replies and very belated follow up to this but it was a failed coil pack in the end so was replaced along with spark plug.

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996 C4S Check Engine light
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Leading evidence: 'Replace along' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace along' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

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1 matching discussions · 4 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Replace along

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

Thanks for the replies and very belated follow up to this but it was a failed coil pack in the end so was replaced along with spark plug.

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996 C4S Check Engine light
Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Porsche Club GB: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

1 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link

Made it home ok but have turned on a couple of times and problem persists.

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No unique explicit quoted action; no causal link assigned

Generation: 20261027T060112Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi Out for a spirited drive in my 2002 996 C4S with 60k miles when notice a sudden reduction in power and then Check Engine light comes on. Power delivery now feels stuttery (for want of a better word), almost like engine feels like it was close to stalling (but doesn't). Notice a slight rocking too at idle as if not on all cylinders. Made it home ok but have turned on a couple of times and problem persists. Starts off with a flashing Check Engine light when started cold but then seems to switch to a solid Check Engine light when warmed up (which hopefully means it's ok to drive to Specialist). Any suggestions guys as to the potential problem? Thanks in advance.

POST 3Original post

Agreed. The most efficient way to get to the bottom of the problem Conor will be to run some Porsche-specific diagnostics [PIWIS or equivalent], otherwise it’s just a guessing game: fuelling, ignition or electronics … who knows????? A flashing CEL is not good, but if it’s solid you should be OK to drive gently to your specialist. Jeff

POST 4 / ORIGINAL POSTEROriginal post

Thanks for the replies and very belated follow up to this but it was a failed coil pack in the end so was replaced along with spark plug. Other issues and potential issues (IMS!) spotted by the Specialist so the jobs (and bill!) snowballed somewhat but in the end, a refreshed 996 back in my hands and ready for some great driving experiences including north Wales & Cotswolds road-trip in September.

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